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SVTPerformance's Chain of Restaurants
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Life after the "Terminator"
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<blockquote data-quote="jbrown1238" data-source="post: 13715230" data-attributes="member: 56552"><p>A week or so ago I determined that the piston ring gap on each of the top and second rings would need to be file fit to spec. Today I had a few hours to tackle this project so I started by clearly marking the top side of each ring to avoid confusion during the process.</p><p></p><p>[ATTACH=full]529424[/ATTACH]</p><p></p><p>I also marked the six o’clock position to use as a reference point to help keep the ring square as the gap is being cut.</p><p></p><p>[ATTACH=full]529425[/ATTACH]</p><p></p><p>I set up two pieces of aluminum angle in a vise with a file placed in the center of the two. The aluminum pieces act as a guide to helped keep the ring squared horizontally as the gap is being cut. I then added some painters tape to the aluminum so the bottom side of the ring would not be scratched. Then I measured the inside diameter of the ring and marked the file so I didn’t go too far on each pass and bang the back side of the ring. Because of the Moly coating each pass should be from the outside of the ring towards the inside. By using this method the Moly coating shouldn’t chip as the ring is pushed along the edge of the file. I was very careful to only file one side of the gap, to keep the ring squared on each pass, and double check the gap alignment by holding it up to the light and compressing the ring so the gap closed on itself. By doing so the file side could be compared to the stock side to make sure the gap was consistent from the inside to the outside. If any light can be seen either on the inside or the outside of the gap the next few passes can be adjusted by moving the mark at the six o’clock position right or left as needed.</p><p></p><p>[ATTACH=full]529426[/ATTACH]</p><p></p><p>Each gap was carefully checked and rechecked as it was brought into spec until the final number was perfect. Then all four sides of the corrected end on each ring were lightly dressed with 400 grit paper to clean any burrs.</p><p></p><p>[ATTACH=full]529427[/ATTACH]</p><p></p><p>[ATTACH=full]529428[/ATTACH]</p></blockquote><p></p>
[QUOTE="jbrown1238, post: 13715230, member: 56552"] A week or so ago I determined that the piston ring gap on each of the top and second rings would need to be file fit to spec. Today I had a few hours to tackle this project so I started by clearly marking the top side of each ring to avoid confusion during the process. [ATTACH=full]529424[/ATTACH] I also marked the six o’clock position to use as a reference point to help keep the ring square as the gap is being cut. [ATTACH=full]529425[/ATTACH] I set up two pieces of aluminum angle in a vise with a file placed in the center of the two. The aluminum pieces act as a guide to helped keep the ring squared horizontally as the gap is being cut. I then added some painters tape to the aluminum so the bottom side of the ring would not be scratched. Then I measured the inside diameter of the ring and marked the file so I didn’t go too far on each pass and bang the back side of the ring. Because of the Moly coating each pass should be from the outside of the ring towards the inside. By using this method the Moly coating shouldn’t chip as the ring is pushed along the edge of the file. I was very careful to only file one side of the gap, to keep the ring squared on each pass, and double check the gap alignment by holding it up to the light and compressing the ring so the gap closed on itself. By doing so the file side could be compared to the stock side to make sure the gap was consistent from the inside to the outside. If any light can be seen either on the inside or the outside of the gap the next few passes can be adjusted by moving the mark at the six o’clock position right or left as needed. [ATTACH=full]529426[/ATTACH] Each gap was carefully checked and rechecked as it was brought into spec until the final number was perfect. Then all four sides of the corrected end on each ring were lightly dressed with 400 grit paper to clean any burrs. [ATTACH=full]529427[/ATTACH] [ATTACH=full]529428[/ATTACH] [/QUOTE]
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